USED IN NATURAL HISTORY. 



61 



pericarp, commonly termed the 

 skin of the fruit. 



EPICOROI/LE.E. fr. gr. epi, upon ; co- 

 rolla. Name of a class of plants. 



EPIUE'MIC. fr. gr. epi, upon ; demos, 

 the people. A prevailing disease. 



EPIDE'RMIC. Relating or belonging 

 to the epidermis. 



EPIDE'RMIS. fr. gr. epi, upon ; der- 

 ma, skin. The external covering 

 of the derma. The cuticle or 

 scarf-skin. 



EPIG'ENE. fr. gr. genos, a kind. Ap- 

 plied to substances found natu- 

 rally crystallized in a form which 

 does not belong to themselves, but 

 to some other compound of the 

 same base. 



EPI'GEOUS. fr. gr. ge, the earth. 

 Applied to plants when they grow 

 close upon the ea"rth ; and to those 

 cotyledons which emerge from 

 the ground, and assume the colour 

 of leaves. 



EPIGLOTTIS. fr. gr. epi. upon ; glot- 

 tis, the glottis. A species of par- 

 tilaginous valve, situate at the up- 

 per part of the larynx, behind the 

 base of the tongue. It closes at 

 the moment of swallowing, and 

 thus assists in preventing the pas- 

 sage of alimentary substances 

 into the air tubes. 



EPIGY'NEJE. fr. gr. epi, upon ; gune, 

 pistil. Name of a class of plants. 



EPIGY'NOUS. That condition of the 

 stamens of a plant in which they 

 adhere both to the calyx and ova- 

 ri u m . 



EPIMK'HAL. fr. gr. meros, a part or 

 limb. The segment of an articu- 

 late animal which is above the 

 joint of the limb. 



EPIPK'TALOUS. fr. gr. epi, upon ; pe- 

 talon, petal. Inserted unon the 

 petal. 



EPIPHYL'LOUS. -fr. gr. /', upon ; phul- 

 lon, a leaf. Inserted upon the leaf 

 of a plant. 



EP'IPHYTE. fr. gr. epi, upon ; phutos, 

 a plant. Applied to plants which 

 grow upon other plants. 



E'PISPERM fr. gr. epi, upon ; sper- 

 ma, seed. The integument of the 

 seed. 



EPISPERMA'TIC. Relating to epi- 

 sperm. 



E'POCH. The time from which dates 

 are numbered. 



E'POCH OF FORMATION. The period 

 of time during which a forma- 

 tion was produced, (p. 192, Book 

 viii). 



EQ.UA'LIS. Lat. Equal. 



EQ.UA'TION. fr. lat. cequare, to equal. 

 Equivalent. A mean proportion 

 between extremes. 



EauiLi'sRiUM. fr. lat.teque, equally; 

 libro, I balance. Equal balance. 



EQ.UINOCTIAL FLOWERS. Flowers 

 which open daily at stated hours. 



EQ.UISE'TA. Lat. plur. Equisetum. 

 . fr. equise'tum, one 

 of the genera. A natural order 

 of plants. 



. fr. lat. equus, horse ; 

 seta, hair. A genus of plants. 



E'Q.UITAJTT. A mode of vernation, 

 or of arrangement of leaves with 

 respect to each other, in which 

 the sides or edges alternately 

 overlap each other. 



E'Q.UITALVE. When the two valves 

 of a bivalve shell are symmetri- 

 cal they are said to be equivalve. 

 (p. 97, Book v). 



EQ.UUS. Lat. A horse. 



ERE'CTILE. fr. lat. erigere, to become 

 erect. Susceptible of erection. 



ERECTO - PATENT. Between erect 

 and spreading. 



E'REMACAU'SIS. fr. gr. eremos, slow ; 

 kausis, burning. Slow combus- 

 tion or decay of organic matters 

 in air. 



ERINA'CEUS Lat. Hedgehog. 



ERIX. Generic name of a serpent. 



ERMI'NEA. Lat. Belonging or re- 

 lating to the ermine. 



ERO'DE. fr. lat. erodo, I gnaw. To 

 wear away, to corrode. 



ERO'SE. fr. lat. erosus, gnawed off. 

 Eroded. Gnawed ; having the 

 margin irregularly divided, as i. 



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